The Gauge Connection

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I discuss most recent findings in the area of QCD and strong interactions in the low-energy limit. This involves lattice computations of the spectrum, the problem of the mass gap and existence of Yang-Mills theory.

Marco Frasca
109 posts

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  • December 12, 2011
  • 06:15 AM
  • 4,550 views

Yang-Mills scenario: Yet a confirmation

by Marco Frasca in The Gauge Connection

While CERN is calming down rumors (see here), research activity on Yang-Mills theories keeps on going on.  A few days ago, a paper by Axel Weber appeared on arxiv  (see here). As my readers know, having discussed this at length, in these last years there has been a hot debate between the proponents of the [...]... Read more »

Marco Frasca. (2007) Infrared Gluon and Ghost Propagators. Phys.Lett.B670:73-77,2008. arXiv: 0709.2042v6

  • November 28, 2011
  • 09:34 AM
  • 1,022 views

Yang-Mills mass gap scenario: Further confirmations

by Marco Frasca in The Gauge Connection

Alexander (Sasha) Migdal was a former professor at Princeton University. But since 1996, he is acting as a CEO of a small company. You can read his story from that link. Instead, Marco Bochicchio was a former colleague student of mine at University of Rome “La Sapienza”. He was a couple of years ahead of [...]... Read more »

Marco Bochicchio. (2011) Glueballs propagators in large-N YM. arXiv. arXiv: 1111.6073v1

Alexander Migdal. (2011) Meromorphization of Large N QFT. arXiv. arXiv: 1109.1623v2

Marco Frasca. (2010) Mapping theorem and Green functions in Yang-Mills theory. PoS FacesQCD:039,2010. arXiv: 1011.3643v3

  • November 19, 2011
  • 04:40 AM
  • 934 views

QCD at finite temperature

by Marco Frasca in The Gauge Connection

The great news for me, in this week, has been the acceptance of my paper of QCD at finite temperature in Physical Review C (see here). This chance concreted after the excellent work of the referee that helped me to improve the paper in a significant way. For a good paper, such a way to [...]... Read more »

  • November 18, 2011
  • 10:12 AM
  • 995 views

Today great news!

by Marco Frasca in The Gauge Connection

A couple of fundamental great news, well one is just a rumor, is hitting scientific community today. Higgs search: At Paris Conference, Gigi Rolandi addresses his talk on combination for LHC and Tevatron. This picture has been waitd for a long time since the excellent work of Phil Gibbs at his blog (see here for [...]... Read more »

Marco Frasca. (2010) Mass generation and supersymmetry. arXiv. arXiv: 1007.5275v2

The OPERA Collaboraton: T. Adam, N. Agafonova, A. Aleksandrov, O. Altinok, P. Alvarez Sanchez, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Autiero.... (2011) Measurement of the neutrino velocity with the OPERA detector in the CNGS beam. arXiv. arXiv: 1109.4897v2

  • November 11, 2011
  • 04:22 AM
  • 1,061 views

News on the Higgs

by Marco Frasca in The Gauge Connection

The end of this year is approaching, LHC gathered data at higher luminosity but it is since the end of August that no news is around about the status of the search of the Higgs particle. Of course, frenzy activity is going around at CERN and finally, something seems to move. On Monday a new [...]... Read more »

Marco Frasca. (2010) Mass generation and supersymmetry. arXiv. arXiv: 1007.5275v2

Marco Frasca. (2010) Mapping theorem and Green functions in Yang-Mills theory. PoS FacesQCD:039,2010. arXiv: 1011.3643v3

P. Cea, & L. Cosmai. (2011) The trivial Higgs boson: first evidences from LHC. arXiv. arXiv: 1106.4178v1

P. Cea, & L. Cosmai. (2011) The Trivial Higgs at LHC. arXiv. arXiv: 1109.5922v1

  • November 7, 2011
  • 05:28 AM
  • 1,158 views

A Millenium Problem issue

by Marco Frasca in The Gauge Connection

As my readers know, a recurring question in this blog is the solution to the Millenium Problem on Yang-Mills theory. So far, we have heard no fuzz about this matter and the page at the Clay Institute is no more updated since 2004. But in these years, activity on this problem has been significant and [...]... Read more »

Marco Frasca. (2007) Infrared Gluon and Ghost Propagators. Phys.Lett.B670:73-77,2008. arXiv: 0709.2042v6

I. L. Bogolubsky, E. -M. Ilgenfritz, M. Müller-Preussker, & A. Sternbeck. (2009) Lattice gluodynamics computation of Landau-gauge Green's functions in the deep infrared. Phys.Lett.B676:69-73,2009. arXiv: 0901.0736v3

Ph. Boucaud, J. P. Leroy, A. Le Yaouanc, J. Micheli, O. Péne, & J. Rodríguez-Quintero. (2011) The Infrared Behaviour of the Pure Yang-Mills Green Functions. arXiv. arXiv: 1109.1936v1

  • October 25, 2011
  • 03:59 AM
  • 897 views

From arxiv today

by Marco Frasca in The Gauge Connection

Today the daily from arxiv is particularly rich. A couple of papers are from my friend Marco Ruggieri, one in collaboration with Raul Gatto (see here) and the other is the contribution to Paris Conference proceedings (see here). Marco is currently using a Nambu-Jona-Lasinio model to understand the behavior of hadronic matter at high temperatures [...]... Read more »

Raoul Gatto, & Marco Ruggieri. (2011) Hot Quark Matter with an Axial Chemical Potential. arXiv. arXiv: 1110.4904v1

Marco Ruggieri. (2011) Quark Matter with a Chiral Chemical Potential. arXiv. arXiv: 1110.4907v1

Marco Frasca. (2008) Infrared QCD. Int.J.Mod.Phys.E18:693-703,2009. arXiv: 0803.0319v5

Ding-fang Zeng. (2011) Confinings of QCD at purely classic levels. arXiv. arXiv: 1110.5054v1

Marco Frasca. (2010) Mapping theorem and Green functions in Yang-Mills theory. PoS FacesQCD:039,2010. arXiv: 1011.3643v3

Sidney Coleman. (2011) Notes from Sidney Coleman's Physics 253a. arXiv. arXiv: 1110.5013v1

  • October 12, 2011
  • 04:22 AM
  • 1,176 views

QCD is confining

by Marco Frasca in The Gauge Connection

At Bari Conference , after I gave my talk, Owe Philipsen asked to me about confinement in my approach. The question came out also in the evening, drinking a beer at a pub in the old Bari. Looking at my propagator, it is not so straightforward to see if the theory is confining or not. [...]... Read more »

Gunnar S. Bali. (2000) QCD forces and heavy quark bound states. Phys.Rept.343:1-136,2001. arXiv: hep-ph/0001312v2

Wilson, K. (1974) Confinement of quarks. Physical Review D, 10(8), 2445-2459. DOI: 10.1103/PhysRevD.10.2445  

Slavo Kratochvila, & Philippe de Forcrand. (2003) Observing string breaking with Wilson loops. Nucl.Phys. B671 (2003) 103-132. arXiv: hep-lat/0306011v2

Marco Frasca. (2011) QCD is confining. arXiv. arXiv: 1110.2297v1

A. C. Aguilar, D. Binosi, & J. Papavassiliou. (2008) Gluon and ghost propagators in the Landau gauge: Deriving lattice results from Schwinger-Dyson equations. Phys.Rev.D78:025010,2008. arXiv: 0802.1870v3

  • September 26, 2011
  • 09:29 AM
  • 1,002 views

A box seat at OPERA

by Marco Frasca in The Gauge Connection

While at Bari Conference (see here), the news was spreading that OPERA Collaboration, a long baseline experiment using muon neutrino beams launched by CERN by CNGS Project, detected a possible Lorentz violating effect. Initially, it started as a rumor in the comment area at Jester’s blog (see here). Then, Tommaso Dorigo provided a full account [...]... Read more »

The OPERA Collaboraton: T. Adam, N. Agafonova, A. Aleksandrov, O. Altinok, P. Alvarez Sanchez, S. Aoki, A. Ariga, T. Ariga, D. Autiero, A. Badertscher.... (2011) Measurement of the neutrino velocity with the OPERA detector in the CNGS beam. arXiv. arXiv: 1109.4897v1

Giovanni Amelino-Camelia, Giulia Gubitosi, Niccoló Loret, Flavio Mercati, Giacomo Rosati, & Paolo Lipari. (2011) OPERA-reassessing data on the energy dependence of the speed of neutrinos. arXiv. arXiv: 1109.5172v1

Giacomo Cacciapaglia, Aldo Deandrea, & Luca Panizzi. (2011) Superluminal neutrinos in long baseline experiments and SN1987a. arXiv. arXiv: 1109.4980v1

  • September 25, 2011
  • 08:02 AM
  • 1,078 views

The XV Workshop on Statistical Mechanics and nonperturbative Field Theory

by Marco Frasca in The Gauge Connection

This week I was in Bari as the physics department of that university organized a major event: SM&FT 2011. This is a biennial conference having the aims to discuss recent achievements in fields as statistical mechanics and quantum field theory that have a lot of commonalities. The organizers are well-known physicists and so it was [...]... Read more »

P. Cea, & L. Cosmai. (2011) The trivial Higgs boson: first evidences from LHC. arXiv. arXiv: 1106.4178v1

Marco Frasca, & Marco Ruggieri. (2011) Magnetic Susceptibility of the Quark Condensate and Polarization from Chiral Models. Phys.Rev.D83:094024,2011. arXiv: 1103.1194v1

  • September 14, 2011
  • 05:55 AM
  • 1,156 views

An interesting review

by Marco Frasca in The Gauge Connection

It is some time I am not writing posts but the good reason is that I was in Leipzig to IRS 2011 Conference, a very interesting event in a beautiful city.  It was inspiring to be in the city where Bach spent a great part of his life. Back to home, I checked as usual [...]... Read more »

Ph. Boucaud, J. P. Leroy, A. Le Yaouanc, J. Micheli, O. Péne, & J. Rodríguez-Quintero. (2011) The Infrared Behaviour of the Pure Yang-Mills Green Functions. arXiv. arXiv: 1109.1936v1

I. L. Bogolubsky, E. -M. Ilgenfritz, M. Müller-Preussker, & A. Sternbeck. (2009) Lattice gluodynamics computation of Landau-gauge Green's functions in the deep infrared. Phys.Lett.B676:69-73,2009. arXiv: 0901.0736v3

  • August 22, 2011
  • 12:17 PM
  • 1,350 views

Higgs particle heavier than ever?

by Marco Frasca in The Gauge Connection

Today in Mumbai (India), at the Lepton-Photon 2011 Conference, talks announcing new results from LHC were held. Data taking claimed almost doubling of data since July Conference in Grenoble. The results were striking and somewhat unexpected. In order to have an idea you should read this CERN press release and the general mood of people [...]... Read more »

Marco Frasca. (2010) Mass generation and supersymmetry. arXiv. arXiv: 1007.5275v2

  • August 16, 2011
  • 01:28 PM
  • 980 views

It was twenty years ago today . . .

by Marco Frasca in The Gauge Connection

With these beautiful words starts a recollection paper by the founder of arXiv, Paul Ginsparg. This is worth the reading as this history spans a number of years exactly overlapping the computer revolution that definitely changed our lives. What Paul also changed through these new information tools was the way researchers should approach scientific communication. [...]... Read more »

Paul Ginsparg. (2011) It was twenty years ago today .. arXiv. arXiv: 1108.2700v1

R. Aouane, V. Bornyakov, E. -M. Ilgenfritz, V. Mitrjushkin, M. Müller-Preussker, & A. Sternbeck. (2011) Landau gauge gluon and ghost propagators at finite temperature from quenched lattice QCD. arXiv. arXiv: 1108.1735v1

Axel Maas, Tereza Mendes, & Stefan Olejnik. (2011) Yang-Mills Theory in lambda-Gauges. arXiv. arXiv: 1108.2621v1

  • August 3, 2011
  • 05:54 AM
  • 1,317 views

What’s going on with Higgs particle?

by Marco Frasca in The Gauge Connection

The aftermath of the EPS Conference is quite exciting on a side. Higgs hunting points to an unexpected direction even if some residuals of an old expectation are still there. I just want to show you the graphs of this conference from Tevatron and LHC From these it is very clear that the excluded range [...]... Read more »

Marco Frasca. (2010) Mass generation and supersymmetry. arXiv. arXiv: 1007.5275v2

  • July 26, 2011
  • 09:22 AM
  • 1,015 views

Slowness in a quantum world

by Marco Frasca in The Gauge Connection

Some days are gone since my last post but for a very good reason. I was very busy on writing down a new paper of mine. Meanwhile, frantic activity was around in the blogosphere due to EPS Conference in Grenoble. No Higgs yet but we do not despair. Being away from these distractions, I was [...]... Read more »

Karl-Peter Marzlin, & Barry C. Sanders. (2004) Inconsistency in the application of the adiabatic theorem. Phys. Rev. Lett. 93, 160408 (2004). arXiv: quant-ph/0404022v6

Born, M., & Fock, V. (1928) Beweis des Adiabatensatzes. Zeitschrift f�r Physik, 51(3-4), 165-180. DOI: 10.1007/BF01343193  

Marco Frasca. (1998) Duality in Perturbation Theory and the Quantum Adiabatic Approximation. Phys.Rev. A58 (1998) 3439. arXiv: hep-th/9801069v3

Ali Mostafazadeh. (1996) The Quantum Adiabatic Approximation and the Geometric Phase. Phys.Rev. A55 (1997) 1653-1664. arXiv: hep-th/9606053v1

  • June 21, 2011
  • 03:47 PM
  • 1,535 views

Evidence of a QCD critical endpoint at RHIC

by Marco Frasca in The Gauge Connection

A critical endpoint in QCD is a kind of holy grail in nuclear physics. It has been theorized as a point where deconfinement occurs and hadronic matter leaves place to some kind of plasma of quarks and gluons. We know that the breaking of chiral symmetry is something that people has proposed several years ago [...]... Read more »

Z. Fodor, & S. D. Katz. (2001) Lattice determination of the critical point of QCD at finite T and \mu. JHEP 0203 (2002) 014. arXiv: hep-lat/0106002v2

Philippe de Forcrand. (2010) Simulating QCD at finite density. PoS (LAT2009)010, 2009. arXiv: 1005.0539v2

M. A. Stephanov. (2008) Non-Gaussian fluctuations near the QCD critical point. Phys.Rev.Lett.102:032301,2009. arXiv: 0809.3450v1

Christiana Athanasiou, Krishna Rajagopal, & Misha Stephanov. (2010) Using Higher Moments of Fluctuations and their Ratios in the Search for the QCD Critical Point. Physical review D. arXiv: 1006.4636v2

  • June 13, 2011
  • 03:43 PM
  • 880 views

Back from Paris

by Marco Frasca in The Gauge Connection

It is several days that I have no more posted on the blog but for a very good reason: I was in Paris for the Eleventh Workshop on Non-Perturbative Quantum Chromodynamics (see here). It has been a beautiful chance to see Paris with the eyes of a tourist and being immersed in a lot of [...]... Read more »

P. Castorina, V. Greco, D. Jaccarino, & D. Zappalà. (2011) A reanalysis of Finite Temperature SU(N) Gauge Theory. arXiv. arXiv: 1105.5902v1

Irene Amado, Karl Landsteiner, & Francisco Pena-Benitez. (2011) Anomalous transport coefficients from Kubo formulas in Holography. JHEP 05 (2011) 081. arXiv: 1102.4577v3

H. M. Fried, Y. Gabellini, T. Grandou, & Y. -M. Sheu. (2009) Gauge Invariant Summation of All QCD Virtual Gluon Exchanges. Eur.Phys.J.C65:395-411,2010. arXiv: 0903.2644v2

  • June 1, 2011
  • 05:38 AM
  • 1,321 views

CDF bump at 4.8 sigma!

by Marco Frasca in The Gauge Connection

In these days I am exceeding with exclamation marks but let me say that there are sound reasons for this. I will keep on staying on a prudence line as my more renowned colleagues are doing but there is a talk by Giovanni Punzi, the spokesman of CDF Collaboration at Tevatron, (see here), presenting the [...]... Read more »

Kingman Cheung, & Jeonghyeon Song. (2011) Baryonic Z' Explanation for the CDF Wjj Excess. arXiv. arXiv: 1104.1375v3

  • May 30, 2011
  • 06:09 AM
  • 1,308 views

A critical point in QCD exists indeed!

by Marco Frasca in The Gauge Connection

After my comeback from the conference in Ghent (see here, here and here), I started a collaboration with Marco Ruggieri. Marco was instrumental in making me aware of that part of the community that does computations in QCD at finite temperature. The aim of these people is to get a full landscape of the ground [...]... Read more »

T. Hell, S. Roessner, M. Cristoforetti, & W. Weise. (2008) Dynamics and thermodynamics of a nonlocal Polyakov--Nambu--Jona-Lasinio model with running coupling. Phys.Rev.D79:014022,2009. arXiv: 0810.1099v2

D. Gomez Dumm, & N. N. Scoccola. (2004) Characteristics of the chiral phase transition in nonlocal quark models. Phys.Rev. C72 (2005) 014909. arXiv: hep-ph/0410262v2

  • May 3, 2011
  • 06:25 AM
  • 956 views

Today in arXiv (2)

by Marco Frasca in The Gauge Connection

Today I have found some papers in the arXiv daily that makes worthwhile to talk about. The contribution by Attilio Cucchieri and Tereza Mendes at Ghent Conference “The many faces of QCD” is out (see here). They study the gluon propagator in the Landau gauge at finite temperature at a significantly large lattice. The theory [...]... Read more »

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